MK1 TT Knowledge Base - The Index

Electrical
Wiring diagrams
- General system diagram: Schematic wiring diagram.
- Wiring diagram for fuel pump/sender: Courtesy of lazerjules.
- Air conditioning diagram: - Airconditioning schematic - courtesy of laserjules.
- Fuses (dash): - Fuse panel at driver's side dashboard end - courtesy of Wak.
- Fuses (battery): - Fuse panel over battery - courtesy of Hoggy.

Standard equipment
- Air conditioning Self Study: - VAG aircon self study programme covering the TT - courtesy of volkspage.net
- Climate control codes: - Fault and diagnostic codes available on the climate display - courtesy of Ellied02
- Air conditioning fan rattle: - Annoying rattle from dash fixed with Blu-Tack - courtesy of sax_offender.
- Fan replacement: - How to replace a radiator fan - courtesy of Stevie Jinx
- Fan controller broken wire: - Broken wire on fan controller stops fans working - courtesy of tommatt90
- Leaking heater couplers: - Misted up windows? Mystery coolant leak? Could be your couplers - courtesy of John-H
- Leaking heater matrix: - Misted up windows? Wet carpet? Could be your heater matrix - courtesy of John-H
- Air conditioning Magnetic Clutch fix: - How to fix a failed early compressor clutch - courtesy of John-H.
- Battery problems: - Battery starting problems diagnosed - courtesy of John-H.
- Battery replacement: - Battery replacement - courtesy of 3TT3.
- Alternator problems: - Alternator regulator replacement - courtesy of steve o.
- Alternator regulator 1: - Alternator regulator replacement - courtesy of John-H and others.
- Alternator regulator 2: - Useful video about regulator replacement - courtesy of danchiefton.
- Cruise control: - How to fit cruise control - courtesy of folkswagon.
- Dashpod disassembly: - How to disassemble the dashpod and change colour - courtesy of ViperOneZero.
- Dashpod clock: - How to Adjust / Correct / Alter / Change the Clock / Time - courtesy of peter-ss.
- Dashpod LCD replacement: - How to replace a failing LCD display - courtesy of peter-ss.
- Dashpod gauge replacement: - How to change the fuel and temperature gauges video - courtesy of Darcstartv.
- Dashpod fuel gauge fix: - Faulty dashpod fuel gauge fix - courtesy of dpbayle (Note: compensates for motor failed coil/calibration)
- Dashpod removal: - Dashpod removal advice - courtesy of various.
- Dashpod DIS custom text: - Dashpod DIS costom text mod - courtesy of horseoutside.
- Radio removal: - How to remove your radio - courtesy of John-H.
- Radio PIN code: - How to enter your PIN code - courtesy of forker.
- Radio PIN code - obtaining: - How to obtain your lost PIN code from Audi - courtesy of John-H.
- Intermittent stereo volume control fix 1: - A DIY fix - courtesy of laserjules.
- Intermittent stereo volume control fix 2: - when the volume fault is alternatively due to faulty software you can replace the chip
- Radio flap repair: - Repairing the radio flap - courtesy of ades tt 180
- Key code solutions: - How to code and re-synchronise your keys' remote - courtesy of HIRAM, tt z and John-H.
- Key coding Guide: - How to code your keys immobiliser - courtesy of ViperOneZero.
- Flasher unit fix: - How to prolong the life of yout flasher unit when your indicators start failing - courtesy of John-H.
- Alarm siren fix: - How to fix a dead or failing alarm siren - courtesy of John-H.
- Door motor repair: Replacing the internal relay to fix a failed window motor - courtesy of John-H.
- Washer bottle fix: - How To fix a leaking washer bottle and pump - courtesy of John-H.
- Windscreen wiper issues: - How To fix/replace the motor and linkages - courtesy of poor1 and John-H.

Lighting
- Headlight performance: Restoring your headlight performance - courtesy of John-H.
- Headlight igniter: Replacement of ignitor without headlight removal - courtesy of basky.
- Painted headlight inserst and tinted corners: - Pictures courtesy of TT51.
- Eclipse Lights & Clear/Smoke Corner fitting: Full fitting instructions - courtesy of wak
- Puddle lighting - How To: To light up the puddles under your doors as you open them - courtesy of Hark.
- Door handle, Puddle + Footwell lighting - How To: More places to put LEDs - courtesy of harrismhone and others.
- LED courtesy lights - How To: LED lighting options and how to stop flickering - courtesy of John-H.
- Clear corners - How To: How to make your own clear corners - courtesy of reeceturner3.
- Headlight level sensors: Fixing problems with the headlight level sensors - courtesy of steveupton.
- Welcome home lights: - How to light up your fog lights when you exit the car - courtesy of Pugwash69.
- Twin brake lights: - How to make the unused brake light bulb light up - courtesy of triplefan.
- Symmetrical rear lights: - How to wire up your rear lights in symmetry - courtesy of Bartsimpsonhead .
- LHD/RHD Europe switchover: - How to change over your headlights when on the continent - courtesy of Wak.

ESP
- G200/G251 Lateral/Longitudinal sensors: - Sensor diagnosis, removal and repair - courtesy of John-H, A3DFU, shaneg and others.
- Reset Long/Lat Sensors (G200/G251): - How to reset the Long/Lat sensors - courtesy of Tony Rigby
- Steering Angle sensor G85): - How to fix a faulty Steering Angle Sensor (G85) - courtesy of Elmbo

ICE and other modifications
- Head unit replacement thread: - many contributors
- Kenwood head unit: - Kenwood KIV901BT install notes and pictures - courtesy of horseoutside
- Alpine IDA-X305 head unit: - Fitting and various mods and options discussed - courtesy of RichDean.
- PC install: - courtesy of Spandex
- Hard wire a screen mount camera: - How to neatly install permanent wiring for camera - courtesy of Pugwash69.
- Battery voltmeter: - How to add a voltmeter to your battery - courtesy of Pugwash69.
- Liquid gauge fitting: - How to fit Liquid gauge - courtesy of Lollypop86.

Suspension
- Wheel alignment settings and adjustment: Settings data and explanation of geometry including lowering effects and where to fit adjustable tie bars - courtesy of John-H.
- DIY wheel alignment tool: DIY wheel alignment tool - courtesy of Peter-ss.

Front suspension
- Spring replacement: Complete guide - courtesy of Chip_iTT.
- Koni Spring replacement: How to change a broken spring without removing the strut - courtesy of John-H.
- Identifying springs : Identify by the coloured dots - courtesy of warrenstuart.
- Bilstein dampers and Eibach springs: Photographs of istallation - courtesy of TT2QK2.
- Top mount and bearing: Discussion and links to DIY and pictures by Steve Schwing
- Wishbone bushing replacement: Pressing in with DIY press - courtesy of brian1978.
- Wishbone rear bush replacement on the car: How to press bushes in with TCA on car - courtesy of John-H.
- Control Arm bushings, ball joints, outer tie rod ends: Photographs of istallation - courtesy of TT2QK2.
- DEFCON install: Photographs of istallation - courtesy of Mike Philips, DEFCON developer
- OEM ARB bushing replacement: Photographs of istallation - courtesy of TT2QK2.
- Tie rod end replacement: How To: Change a tie rod end ball joint - courtesy of TheVarix
- Tie rod end seized - how to remove: What to do when the ball spins with the nut.
- Front ARB replacement - how to: Complete comprehensive DIY instructions from TT DWN UNDER.
- Wheel bearing replacement: How to replace a front wheel bearing in situ with a press kit - John-H.
- Steering rack pre-load: How to adjust the steering rack play and remove rattles - courtesy of John-H.
- Steering rack end tie rod: How to replace the steering rack end ball joint and tie rod - courtesy of John-H.

Rear suspension
- Bilstein Sport Rear Shocks with Eibach Pro Springs: Photographs of istallation - courtesy of TT2QK2.
- Suspension torque setings and exploded diagram: Courtesy of lazerjules.
- Rear ARB replacement - how to: Complete comprehensive DIY instructions from TT DWN UNDER.
- Rear tie bar outer ball joint replacement - how to: Complete comprehensive DIY instructions from peter-ss
- Wheel bearing replacement: Front bearing shown but similar procedure with same bearing for quattro - John-H.

General suspension
- Tony's handling package: General handling package - courtesy of Tony Rigby.
- Geometry and handling: How geometry and suspension modifications affect handling - courtesy of John-H.

Brakes
- Front disc and pad replacement: - Complete guide - courtesy of Chip_iTT.
- Rear disc and pad replacement: - Complete guide - courtesy of Chip_iTT. Tip
- Changing Rear Brake Discs & Pads: - Courtesy of cwiseh_tt.
- Rear brakes and caliper replacement: - Complete guide - courtesy of TheVarix.
- 2-pot M4 Golf\R32 / M1 TT V6 Brakes: - Complete guide courtesy of tony_rigby_uk.
- ABS wheel sensor replacement: - How to replace the sensor courtesy of freegeek - useful additional comments too.
- Bleeding brakes: - Advice on bleeding sequence and method including VAG-COM and clutch - Courtesy of John-H.
- Bleeding brakes: - Brake Fluid Flush and Bleed Video - Courtesy of wilbaroo.
- ABS pump repair: - How to repair a common failure of the ABS pump - courtesy of John-H.
- Brake disc painting: - How to rustproof your discs - courtesy of T3RBO.
- Brake switch fitting: - How to fit a new brake switch without breaking it - courtesy of RgRt6.
- Rear caliper rebuild: - How to refurbish a rear caliper- courtesy of P.D.Q of Audiworld
- Clutch nipple: - Replacing Clutch Bleed Valve/Nipple - courtesy of slihp67

Wheels + Tyres
- Jacking up 1: - How To jack up your car - courtesy of Mike Philips of DEFCON fame on Audiworld.
- Jacking up 2: - Safe jacking point discussion and how to avoid bent floors - courtesy of John-H and others.
- Wheel Cleaning, Treatment and Refurbishing: - How to look after or repair your wheels
- Definitive Wheel thread: - All sorts of wheels, pictures and information.
- Photoshop wheels thread: - All sorts of wheels, "Photoshopped" onto TTs for your contemplation.
- Wheel comparison calculator: - Compare size, offsets, speed, weight etc - courtesy of Rimsntires
- Basic wheel offset calculator: - Calculate and plot basic wheel offset geometry - courtesy of Jonathan Rowny

Track and Motorsport
- MSA Blue Book: The bible for motorsport - complete pdf - courtesy of NickG
- MSA Yearbooks: MSA Yearbook broken down into individual section pdfs - courtesy of John-H
- Installing 6-point Harnesses: Installing a 6-point Harness to your TT - courtesy of NickG

Miscellaneous
- Wak-TT: Wak's website, full of TT How To guides and information - courtesy of Wak
- TT wikipedia: General and detailed collection of TT facts and information - courtesy of Wikipedia
- Numerous mods: - Many modifications too numerous to mention - courtesy of blackfnTTruck
- ModShack: - A number of modifications for your TT - courtesy of Steve Schwing
- List of suppliers: - Various suppliers for your TT - courtesy of lazerjules
- MOT Testers Manual: - Full listing of rules and regulations with advisory notes.
- MOT Testers Manual VOSA: - Official VOSA MOT testers' manual - browse and download.
- Speed bump regulations: - DOT advisory leaflet defining allowed dimensions.
- BAC calculator: - Calculate blood alcohol level - based on US DOT published data.